Rubic (RBC) underwent a contract migration on the 12th of December, at around 11:00 AM UTC.
The old Rubic token (RBC V1) was successfully deprecated at that time, and Kraken successfully migrated all client balances to RBC V2
From block 16168491 onwards, the only RBC contract Kraken interacts with is 0x3330BFb7332cA23cd071631837dC289B09C33333.
Funding was re-enabled after the successful migration of the token to the new RBC V2 contract, and all Withdrawals of RBC are now sent as RBC V2.